Test data can be found in the
Application Curves section of the LP875761-Q1 Four-Phase 3-MHz 1-V 16-A
DC/DC Buck Converter With Integrated Switches Datasheet.
Additional bench test data for load
transient response, efficiency, and phase margin can be seen in this section at
different input voltages.
Measurements were taken on
LP875761Q1EVM with default components. For load transient a special high speed
amplifier controlled current sink was used to realize 4 A to 12 A to 4 A transient
with 1 µs slew rate (8A / µs).
Control loop response (Bode plot) was
measured with Keysight MSOX6004A oscilloscope.
Figure 6-2 LP875761-Q1 Load Transient
Response at Vin = 5 V, 25°C. -13.7 mV / +17.2 mV
Figure 6-4 LP875761-Q1 Load Transient
Response at Vin = 5 V, -40°C. -14.0 mV / +16.8 mV
Figure 6-6 LP875761-Q1 Load Transient
Response at Vin = 3.3 V, 125°C. -18.1 mV / +18.2 mV
Figure 6-8 LP875761-Q1 Phase Margin /
Bode Plot at Vin = 5 V, 25°C
Figure 6-10 LP875761-Q1 Phase Margin /
Bode Plot at Vin = 5 V, -40°C
Figure 6-12 LP875761-Q1 Phase Margin /
Bode Plot at Vin = 3.3 V, 125°C
Figure 6-3 LP875761-Q1 Load Transient
Response at Vin = 5 V, 125°C. -14.3 mV / +17.7 mV
Figure 6-5 LP875761-Q1 Load Transient
Response at Vin = 3.3 V, 25°C. -17.7 mV / +18.0 mV
Figure 6-7 LP875761-Q1 Load Transient
Response at Vin = 3.3 V, -40°C. -17.3 mV / +17.6 mV.
Figure 6-9 LP875761-Q1 Phase Margin /
Bode Plot at Vin = 5 V, 125°C
Figure 6-11 LP875761-Q1 Phase Margin /
Bode Plot at Vin = 3.3 V, 25°C
Figure 6-13 LP875761-Q1 Phase Margin /
Bode Plot at Vin = 3.3 V, -40°C